一种基于HY-2卫星数据的多载荷联合海流反演算法研究-海洋预报

一种基于HY-2卫星数据的多载荷联合海流反演算法研究

单位：国家卫星海洋应用中心, 北京 100081

分类号：P731.21

出版年·卷·期（页码）：2016·33·第四期（53-57）

摘要：

基于长时间序列的多载荷HY-2卫星资料，利用OSCAR算法计算海流，不仅考虑了海面动力高度场和风场，还加入了海表温度梯度场，对于赤道处的处理采用正交多项式拟合的数学方法。将由动力模型算法得到的基于海洋二号卫星数据的反演海流结果和OSCAR海流数据产品进行对比验证。结果表明在近赤道处较差，中高纬地区较好。两种算法标准差在近赤道处达到0.30m/s，在中高纬地区为0.05m/s到0.10m/s。

Based on the long time series of multiple sensor data onboard HY-2 satellite, the ocean current is calculated using the OSCAR algorithm. The sea surface height field, sea surface wind filed and sea surface temperature gradient field are considered in the OSCAR algorithm. The orthogonal polynomial method is adopted under calculating the current at the equator. The inversion current results from OSCAR algorithm based on HY-2 satellite data are compared with the current data product from OSCAR. The results show that the former data is better in the mid-high latitude, while worse near the equator than the latter data. The standard deviations are 0.30 m/s near the equator and are 0.05 m/s to 0.10 m/s in mid-high latitude.

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